How a one person SaaS founder books 15 demos per week with cold email alone

solo_saas_founder · 2026-04-09 · 3,290 views

I'm a solo SaaS founder. No sales team. No marketing budget beyond cold email. Here's exactly how I book 15 demos per week spending $130/month total.

Infrastructure: 20 PuzzleInbox pre-warmed Google Workspace inboxes. Cost: $90/month. These arrive ready to send. I don't touch DNS or deal with warmup.

Sending platform: Instantly Growth plan. Cost: $30/month. Handles sequencing, scheduling, and reply management.

Data: Apollo free tier. Cost: $0. Gives me 10,000 email credits per month. I use about 5,000 because my ICP is narrow enough that I don't need more.

Email verification: ZeroBounce pay-as-you-go. Cost: ~$10/month at my volume.

Total monthly spend: $130.

I send 200 emails per day (10 per inbox across 20 inboxes). That's about 4,400 cold emails per month. My reply rate sits at 4.2%, which gives me roughly 185 replies per month. About 40% of those are positive, so ~74 interested prospects. I convert about 50% of interested replies into demos. That's roughly 37 demos per month, or about 15 per week.

My close rate from demo to paid customer is 22%. That means cold email alone brings in about 8 new customers per month. At $97/month per customer, that's $776 in new MRR monthly. After 5 months: $8K MRR. All from $130/month in cold email infrastructure.

Cold email is the ultimate bootstrapper channel. No other acquisition method gives you this kind of ROI at this price point. Content marketing takes 6+ months to generate leads. Paid ads require thousands per month. Cold email requires $130 and your time writing good copy.